Method for preventing slag from being accumulated at center of high-chromium vanadium-bearing titanomagnetite hearth

A technology of vanadium-titanium magnetite and high-chromium type, which is applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of increasing the difficulty of blast furnace vanadium-titanium magnetite, high melting temperature, and poor desulfurization ability, and achieve optimal thermal Stability, improvement of slag accumulation, effect of preventing slag accumulation

Inactive Publication Date: 2017-12-01
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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AI Technical Summary

Problems solved by technology

For TiO in slag 2 For high-titanium type blast furnace slag with a mass fraction exceeding 20%, except for non-high-titanium type blast furnace slag (excluding TiO 2 、TiO 2 In addition to the general characteristics of mass fraction l

Method used

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  • Method for preventing slag from being accumulated at center of high-chromium vanadium-bearing titanomagnetite hearth
  • Method for preventing slag from being accumulated at center of high-chromium vanadium-bearing titanomagnetite hearth
  • Method for preventing slag from being accumulated at center of high-chromium vanadium-bearing titanomagnetite hearth

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Example Embodiment

[0014] Example

[0015] There are high-chromium vanadium-titanium-magnetite concentrates, the main components of which are shown in Table 1 below:

[0016] Table 1 High chromium type vanadium titanomagnetite concentrate

[0017]

[0018] The main components of the pellets and sinters produced from the high-chromium vanadium-titanium magnetite concentrate and the lumps fed into the furnace at the same time are shown in Table 2:

[0019] Table 2 Main components of high chromium type vanadium-titanium pellets and sinter

[0020]

[0021] When the pellets and sintered ore are in accordance with the ratio of pellet: sinter: lump ore as 16%: 82%: 2%, as iron-containing raw materials, enter with 430kg / t coke and 145kg / t injection pulverized coal In blast furnace smelting, the final slag-iron ratio is 640kg / t, and the main components of the slag are shown in Table 3:

[0022] Table 3 Main components of high-chromium and high-titanium blast furnace slag

[0023]

[0024] I...

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Abstract

The invention relates to the field of blast furnace ironmaking methods, in particular to a method used for preventing slag from being accumulated at the center of a high-chromium vanadium-bearing titanomagnetite hearth and capable of effectively eliminating the slag accumulation at the center of the high-chromium vanadium-bearing titanomagnetite hearth. The slag mainly comprises, by mass, 0.35-0.50% of Cr2O3, 25-28% of CaO, 23.5-26% of SiO2, 7-11% of MgO, 13-15% of Al2O3 and 20-23% of TiO2. According to the method, by precisely adjusting the proportion of the main components in the slag, the thermal stability, the chemical stability and flowability of the slag are optimized effectively, and the slag is made to have the suitable melting temperature and the sufficient desulfurization capacity, so that the situation of the slag accumulation at the center of the high-chromium vanadium-bearing titanomagnetite hearth is prevented. According to the method, the modification of an original scheme is small, the slag accumulation state is improved greatly on the premise of guaranteeing the production efficiency, and the method is especially suitable for the production performed in the high-chromium vanadium-bearing titanomagnetite hearth.

Description

technical field [0001] The invention relates to the field of blast furnace ironmaking methods, in particular to a method for preventing the accumulation of slag in the hearth center of a high-chromium type vanadium-titanium magnetite hearth. Background technique [0002] Blast furnace smelting requires slag to have good thermal and chemical stability, good fluidity, suitable melting temperature and sufficient desulfurization capacity. For TiO in slag 2 For high-titanium type blast furnace slag with a mass fraction exceeding 20%, except for non-high-titanium type blast furnace slag (excluding TiO 2 、TiO 2 In addition to the general characteristics of mass fraction less than 20%), it also has high melting temperature, poor desulfurization ability, and TiO in slag 2 The characteristic of easy reduction leads to thickening of slag, which further increases the difficulty of smelting vanadium-titanium magnetite in blast furnace. In addition to TiO 2 In addition, vanadium-tita...

Claims

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Application Information

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IPC IPC(8): C21B5/04
CPCC21B5/04
Inventor 谢洪恩郑魁蒋胜文永才付卫国饶家庭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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